CN1055453C - Gauge block made of chromium carbide compounded ceramics - Google Patents
Gauge block made of chromium carbide compounded ceramics Download PDFInfo
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- CN1055453C CN1055453C CN 95118227 CN95118227A CN1055453C CN 1055453 C CN1055453 C CN 1055453C CN 95118227 CN95118227 CN 95118227 CN 95118227 A CN95118227 A CN 95118227A CN 1055453 C CN1055453 C CN 1055453C
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- chromium carbide
- wolfram varbide
- gauge
- slip gauge
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Abstract
The present invention relates to a ceramic matrix composite gauge block and a production method thereof. The composite ceramic gauge block has the production method that granular tungsten carbide strengthening phases are added to a chromium carbide base body; main body materials are formed by sintering by a hot pressing method; the main body materials are ground, and the gauge block is obtained. Compared with common metal gauge blocks, the composite ceramic gauge block has the characteristics of good antioxidation performance, corrosion resistance, etc. Compared with ceramic gauge blocks, the composite ceramic gauge block of the present invention has the advantage of high reflectance. The present invention can be used as a correcting tool by the existing light interference technology.
Description
The invention relates to a kind of composite ceramics slip gauge, particularly about a kind of gauge block made of chromium carbide compounded ceramics.
Standard block gauge has been widely used in industry and academia, as the standard of length measurement.The employed standard block gauge of the industrial community that coexists is many with the high carbon alloy made, and minority is then made (United States Patent (USP) 5,272,120, Japanese Patent 63188701) with stupalith.Be aspect the slip gauge of material with the metal, oxidation and the very easily scratch easily of existing alloy slip gauge surface.Therefore use the necessary extreme care of this type of slip gauge, with anti-scratch; Also fingerprint can not be stayed in order to avoid produce rust staining.This slip gauge must oil when storing, and must cause measurement error to avoid oil film thickness through several oil removing program when reusing.Yet during oil removing, because the atmospheric dust particle that the oil film adhering on surface causes the scratch on slip gauge surface easily, and then has influence on the measuring device precision.Therefore use the very inconvenience of this metalloid matter slip gauge.
Be aspect the slip gauge of material (zirconium white, aluminum oxide, silicon carbide or silicon nitride) with the pottery, though have high strength, hardness, be difficult for excellent characteristic such as oxidation than metallic substance, yet because its reflectance deficiency (seeing also table one) therefore can't be made length with existing interference of light technology and measure and proofread and correct.Cause ceramic block gauge in processing and fabricating and the puzzlement of proofreading and correct.
In addition, also the someone utilizes in carbide (as chromium carbide or wolfram varbide) material, is added into metal adhesive (as cobalt, nickel or chromium) and makes the ceramic block gauge product.Though the chromium carbide material has ISO, because the interpolation of metal adhesive, cause the lowered hardness of material, oxidation-resistance and the anticorrosive deterioration that is all, and then shorten work-ing life of product.Therefore neither a kind of favourable settling mode.Therefore present industry is needed a kind of slip gauge of novelty badly, and this slip gauge has ceramic material slip gauge high rigidity concurrently, and is high anticorrosive, is difficult for the advantage that oxidation and metal material slip gauge are fit to be applied to interference of light technology.
Purpose master of the present invention is the ceramic block gauge that a kind of novelty will be provided, and so that a kind of ceramic block gauge high rigidity, high anticorrosive that has concurrently to be provided, be difficult for advantages such as oxidation, and the metal slip gauge is fit to the slip gauge of interference of light technology advantages of application.
Purpose of the present invention also is to provide the ceramic matric composite slip gauge of a novelty.
The present invention also aims to provide a kind of making method of ceramic matric composite slip gauge.
Composite ceramics slip gauge of the present invention is to utilize the not chromium carbide (Cr of containing metallic additive
3C
2) matrix, add wolfram varbide (WC) strengthening phase, make former material through the pressure sintering sintering, form slip gauge again through cutting and grinding.Through the made composite ceramics slip gauge of method of the present invention, the characteristic that has comprises: high corrosion resistance; High rigidity; Excellent Material Strength and toughness; Be bordering on the thermal expansivity of steel material (particularly stainless steel), so the relative error of measuring device that temperature variation causes and analyte is less; And excellent reflectivity and surface gloss.Therefore existing interference of light measuring tool can be used for proofreading and correct composite ceramics slip gauge of the present invention.This is general commercially available effect that ceramic block gauge is beyond one's reach.
The invention provides a kind of wolfram varbide (WC) and chromium carbide (Cr
3C
2) composition, comprise: the wolfram varbide of chromium carbide base material and 0%-35% volume percent, the preferred wherein volume percent of wolfram varbide is between the 5-30.
The present invention also provides a kind of method for making of composite ceramics slip gauge, comprising:
In chromium carbide base material powder, add the tungsten-carbide powder of volume percent 0-35 and give thorough mixing;
In the powder of gained, add ionized water, and give the slurry that is mixed into homogeneous;
With the slurry of the gained drying of anhydrating, extrusion forming;
The solid-state composition of moulding is made hot-pressing processing, make it sintering; And
The composition of gained is ground to required size.
Wherein, the initial volume percent of wolfram varbide is 5-30; Chromium carbide (Cr
3C
2) particle diameter of initial powder of base material is between 0.3-10.0 μ m; The particle diameter of the initial powder of wolfram varbide (WC) strengthening phase is then between 0.1-15.0 μ m.
The present invention further provides a kind of composite ceramic-based slip gauge, wherein comprising chromium carbide base material and volume percent is the wolfram varbide strengthening phase of 0-35.The preferred wherein increasing amount of wolfram varbide strengthening phase is the 5-30 volume percent.
Above-mentioned and other advantage of the present invention and purpose can be following graphic via following explanation and reference, and more shape is clear:
Being simply described as follows of accompanying drawing:
Fig. 1 is the making schema of expression gauge block made of chromium carbide compounded ceramics of the present invention.
Table one is each existing slip gauge material surface reflectance test value.
Table two is to show the composite ceramics slip gauge characteristic test result who makes via method of the present invention.
The detailed making flow process of composite ceramics slip gauge of the present invention as shown in Figure 1.
At first at the powder of 101 preparation reservation ratios: the tungsten carbide powder of 0-30Vo1%, at 102 preparation chromium carbide powders, and 103 with the two mixing.The particle diameter of both initial powders is between 0.2-1 0 μ m, and its median size is respectively 0.2 and 1.5 μ m.
Then powder is inserted in the deionized water 104, after 24 hours combination treatment,, sieve and extrusion forming in 105 the homogeneous slurries drying of being anhydrated again with the casting mold gained, and casting mold is put into graphite mo(u)ld in 10 6, utilize 1400 ℃ to 1700 ℃ high temperature sintering with hot pressing mode.Employed pressure is between 0-50MPa during sintering, and the hold-time at 30 minutes to 4 hours, sintering atmosphere adopts reducing atmosphere (argon gas or nitrogen) or vacuum.Test piece is processed into through No. 600 stone mills wheel in 107 and is slightly larger than the rectangular parallelepiped of subscribing size behind the sintering, reaches the planeness and the size of reservation via the precise finiss of multiple tracks 108 more at last.
The composite ceramics slip gauge matrix of being made by aforesaid way contains the wolfram varbide and the chromium carbide mixed phase of homogeneous.Its material is very fine and close and must be with any metallic sintering aid.Therefore, wolfram varbide of the present invention/gauge block made of chromium carbide compounded ceramics finished product not only guarantees to have the excellent specific property that the chromium carbide material is had, and such as gloss and characteristics such as anticorrosive, the former material of the also purer chromium carbide of its folding strength and toughness has strengthened many.Hardness also significantly rises simultaneously.
Table 2 shows via the made composite ceramics slip gauge characteristic test result of method of the present invention.It is as shown in the table, and composite ceramics slip gauge of the present invention really has excellent characteristic.
Though be not required to be any theoretical restraining, but composite ceramics slip gauge of the present invention has the hardness value of raising, show the wolfram varbide be based on high young's modulus (Yong ' s modulus) and add mutually and cause (young's modulus of wolfram varbide is 710GPa, and the about 385GPa of the young's modulus of chromium carbide).
In addition, the increase of intensity and toughness is because the thermal expansion coefficient difference (wolfram varbide 6.9 * 10 of wolfram varbide and chromium carbide
-6/ ℃ and chromium carbide about 11.2 * 10
-6/ ℃).The difference of this thermal expansivity comes from the process of cooling behind the material densified sintering product, causes wolfram varbide/chromium carbide interface to produce unrelieved stress.This unrelieved stress causes the failure mode of base material: from destroying along brilliant of simple substance chromium carbide, become the grain failure pattern of matrix material.This pattern changes impels the intensity of material to significantly improve.
Why have higher toughness as for composite ceramics slip gauge of the present invention, major cause is that wolfram varbide adds the slight crack turnover cause mutually and the malleableize mechanism of crane span structure causes.And composite ceramics slip gauge of the present invention, its thermal expansivity is by 11.2 * 10
-6/ ℃, reduce to 9.5 * 10
-6/ ℃ (the wolfram varbide additive of 20Vol 1%).Because the thermal expansivity of general steel determinand is about 10 * 10
-6/ ℃ about.Therefore when using slip gauge of the present invention to measure general steel determinand, can reduce the error in measurement that causes because of temperature drift.
Composite ceramics slip gauge of the present invention, all more existing commercially available ceramic block gauge of its surface luster property and luminous reflectance factor (as silicon carbide, silicon nitride, zirconium white rubbish aluminum oxide) is much higher.Near general commercially available steel slip gauge material (shown in test piece in the table one 14).Monomer chromium carbide material with complete densification is example (as table 1 test piece 9), is respectively 47.7% and 55% at 45 degree and the 90 reflectivity mean values of spending.As the tungsten carbide particle that adds 20Vol% is in chromium carbide base material (as test piece in the table 1 7), and not only its machinery is significantly improved, and still can keep excellent reflectivity Characteristics.Reflectivity mean value at 45 degree and 90 degree is respectively 43.7% and 51%.(reflectivity as aluminum oxide 2.4%, zirconium white 6.4%, silicon nitride 4.1% and silicon carbide 9.3% etc. surmounts a lot of this value than general ceramic block gauge material commonly used.Therefore, composite ceramics slip gauge of the present invention is fit to existing its scale error of optical interferometry correction of typist's errors.This is that general commercially available pottery slip gauge is beyond one's reach.Embodiment 1-9
Prepare slip gauge by shown in table one and the table two, its test result is also listed in table one and the table two.
More than relate to the explanation of gauge block made of chromium carbide compounded ceramics of the present invention.Those skilled in the art is not difficult to understand spirit of the present invention by above explanation, and makes different variations according to this and extend.Only if do not exceed spirit of the present invention, all within the scope of its claim.45 ° 90 ° of table one test piece cemented tungsten carbide sintering
Temperature content time reflex rate reflectivity
(℃) Vol.％ (Hrs.) (％) (％)1 1400 14 1 38.3 37.72 1400 14 2 38.3 463 1400 14 4 39.7 434 1500 25 1 38 455 1550 25 1 41 556 1600 25 1 40 487 1600 20 1 43.7 518 1500 0 1 46.7 589 1600 0 1 47.7 5510 1550 Al
2O
3 1 2.4 5.311 1600 ZrO
2 2 6.4 12.512 - Si
3N
4 - 4.1 5.213 - SiC - 9.3 14.114 - PTW?S.S. - 48 59.7
Slip gauge table two
The anti-folding of wolfram varbide content sintering sintering hardness (Hmv) fracture toughness test piece temperature-time intensity
(vol％) (℃) (hr) (GPa) (MPa) (MPa·m
0.5)1 14 1400 2 18.17 804 5.22 14 1400 4 19.78 825 5.53 25 1700 1 23.15 809 6.84 20 1600 1 21.86 883 6.85 25 1550 1 21.22 874 7.06 25 1600 1 22.66 859 7.27 0 1500 1 18.57 574 4.58 0 1600 1 19.41 526 4.1
Claims (6)
1, the composition of a kind of wolfram varbide and chromium carbide comprises: the wolfram varbide of chromium carbide base material and 5～35% (volume).
2, composition as claimed in claim 1, wherein the percent by volume of wolfram varbide is 5～30% (volumes).
3, a kind of method for making of composite ceramics slip gauge comprises:
The adding particle diameter is that the volume percent of 0.1～15.0 μ m is 5～35% tungsten-carbide powder in the chromium carbide base material powder of particle diameter at 0.3～10.0 μ m, and gives thorough mixing;
In the powder of gained, add deionized water, and give the slurry that is mixed into homogeneous;
With the slurry of the gained drying of anhydrating, extrusion forming;
The solid-state composition of moulding is made hot-pressing processing, make it under reducing atmosphere or vacuum, at the pressure of 0～50MPa and 1400～1700 ℃ sintering temperature; And
The composition of gained is ground to required size.
4, method for making as claimed in claim 3, wherein the percent by volume of wolfram varbide is 5～30% (volumes).
5, a kind of composite ceramic-based slip gauge wherein comprises by under reducing atmosphere or vacuum, at the wolfram varbide strengthening phase of the chromium carbide base material and 5～35% (volume) of the sintering temperature of the pressure of 0～50MPa and 1400～1700 ℃.
6, slip gauge as claimed in claim 5, wherein the volume percent of wolfram varbide strengthening phase is 5～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95118227 CN1055453C (en) | 1995-10-13 | 1995-10-13 | Gauge block made of chromium carbide compounded ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95118227 CN1055453C (en) | 1995-10-13 | 1995-10-13 | Gauge block made of chromium carbide compounded ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1148159A CN1148159A (en) | 1997-04-23 |
| CN1055453C true CN1055453C (en) | 2000-08-16 |
Family
ID=5081619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95118227 Expired - Fee Related CN1055453C (en) | 1995-10-13 | 1995-10-13 | Gauge block made of chromium carbide compounded ceramics |
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|---|---|
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949595A (en) * | 2015-05-18 | 2015-09-30 | 青岛文创科技有限公司 | Gauge material and its application |
| CN105054937A (en) * | 2015-08-12 | 2015-11-18 | 温州经济技术开发区滨海志杰机电产品设计工作室 | Silicon carbide medical cursor with inclined grooves in four sides and retractable slide ball |
-
1995
- 1995-10-13 CN CN 95118227 patent/CN1055453C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1148159A (en) | 1997-04-23 |
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